securityfs_create_dir strange comment

[Jan Engelhardt <jengelh@linux01.gwdg.de>]

Hello list,


in security/inode.c, the comment for securityfs_create_dir() reads:

	If securityfs is not enabled in the kernel, the value -ENODEV 
	will be returned.  It is not wise to check for this value, but 
	rather, check for NULL or !NULL instead as to eliminate the need 
	for #ifdef in the calling code.

What is the actual callee that can return NULL - and what should 
module_init() of a module return when securityfs_create_dir() returns 
NULL?


Thanks,
Jan
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